Shelton D J, Coffey K R, Boreman G D
CREOL, University of Central Florida, Orlando, FL 32816-2700, USA.
Opt Express. 2010 Jan 18;18(2):1330-5. doi: 10.1364/OE.18.001330.
For the first time, a tunable reflected phase reflectarray is demonstrated in the thermal infrared. This is done using thermochromic VO(2) square-patch elements in a reflectarray metamaterial configuration. A sixty degree change in reflected phase is measured using a Twyman-Green interferometer, and FTIR measurements show that the resonance reflection minima shifts from 9.2 to 11.2 mum as the sample is heated from 45 through 65 degrees C. These results are in agreement with finite-element method simulations using the optical properties of VO(2) which are measured by infrared ellipsometry.
首次在热红外波段展示了一种可调谐反射相位反射阵列。这是通过在反射阵列超材料结构中使用热致变色VO(2)方形贴片元件来实现的。使用泰曼-格林干涉仪测量到反射相位有60度的变化，傅里叶变换红外光谱（FTIR）测量表明，随着样品从45摄氏度加热到65摄氏度，共振反射最小值从9.2微米移至11.2微米。这些结果与使用通过红外椭偏仪测量的VO(2)光学特性进行的有限元方法模拟结果一致。
